Synthesis and characterization of a novel ruthenium nitrosyl complex and studies on photolability of coordinated NO

In the present communication, we have reported the synthesis and characterization of a novel nitric oxide (NO) donating complex [Ru(L1)(PPh3)2(NO)](ClO4) (2) derived from [Ru(L1)(PPh3)2(Cl)] (1) (L1H2 is pyridine 2,6-dicarboxylic acid and H stands for dissociable proton). Characterization of 2 by UV–Vis, IR and NMR spectral studies revealed the presence of {RuNO}6 species with S = 0 ground state. ESI-MS data also supported the formation of 2. Electrochemical studies on complex 2 were investigated. The coordinated NO was found to be photolabile under visible as well as in UV light and photocleaved NO was transferred to reduced myoglobin.

A novel diamagnetic ruthenium nitrosyl complex having {RuNO}6 moiety was synthesized and characterized spectroscopically. It has been found out that the coordinated NO was photolabile. Photolability of the coordinated NO was examined under visible as well as UV light and photolabile NO was transferred to reduced myoglobin.Figure optionsDownload as PowerPoint slideResearch Highlights
► Ruthenium nitrosyl complex.
► Photorelease of coordinated NO.
► NO transfer to reduced myoglobin.